The results for testing numbers for divisibility in base 10 are laid out here. It appears we’ll be reaching the rational numbers at some point in the spring of 2012.

# education

## Math From Scratch 16: Divisibility Rules (for base 10)

December 1, 2011 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

## Math From Scratch 15: The Fundamental Theorem of Arithmetic

November 1, 2011 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

The fifteenth lesson of the Math From Scratch series, dealing with the Fundamental Theorem of Arithmetic, is available here.

## Math From Scratch schedule changes

October 14, 2011 by W. Blaine Dowler education, math from scratch Bureau 42 Teaches

As some of you know, I have bilateral elbow tendinitis. As a result, I need to reduce the amount of time spent sitting in front of a keyboard. Unfortunately, this has forced me to slow down on the “Math From Scratch” series. From this point on, new lessons will appear on the first of each month, with lesson 15 due November 1. July and August, the “Summer school” month, will be skipped. Thus, there will now be ten lessons per year. Check the Bureau 42 calendar for updates.

## Math From Scratch 14: Defining Division With Remainder

October 1, 2011 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

The next chapter in the Math From Scratch series is available here. We can now define a division algorithm involving remainder.

## Math From Scratch 13: Metric Spaces Other Than Canada

September 10, 2011 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

We can finally define distances, which allows us to establish the number line. Those tools are presented in lesson 13: Metric Spaces Other Than Canada.

## Summer School 2011.9: Assessment – Nonparametric Item Response Theory

August 26, 2011 by W. Blaine Dowler education Summer School

This week’s lesson begins to cover item response theory at levels typically reserved for graduate level work.

## Math From Scratch 12: Other Bases

August 20, 2011 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

With the bases representation theorem established, we can examine the bases that are common to computer science, and how they have plagued some of the more adept Nintendo players of by generation. Lesson 12: Other Bases.

## Summer School 2011.8: Assessment – Computerized Adaptive Testing

August 19, 2011 by W. Blaine Dowler education Summer School

This week’s lesson discusses the future of all norm referenced testing, and much criterion referenced testing.

## Summer School 2011.7: Assessment – Parametric Item Response Theory

August 12, 2011 by W. Blaine Dowler education Summer School

This week’s lesson begins to cover item response theory at levels typically reserved for graduate level work.

## Math From Scratch 17: Modular Arithmetic

January 1, 2012 by W. Blaine Dowler education, math, math from scratch Bureau 42 Teaches

It turns out there needed to be more groundwork than I had anticipated before hitting the Chinese Remainder Theorem. This lesson introduces modular arithmetic, and the Chinese Remainder Theorem will be covered later. I will also be taking a detour to cover all of the math inherent to RSA encryption algorithms in the coming months.